Euchroite
A variety of Minerals
What is Euchroite?
Euchroite is a hydrated copper arsenate hydroxide mineral with formula: Cu2AsO4OH·3H2O. It is a vitreous green to emerald green mineral crystallizing in the orthorhombic system. It has a Mohs hardness of 3.5 - 4.0 and a specific gravity of 3.39 - 3.45. It was first described in 1823 in Ľubietová, Slovakia.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Euchroite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Quick Facts
Physical Properties
- Color
- Bright emerald-green, leek-green; bright bluish green in transmitted light.
- Hardness (Mohs)
- 3.5 - 4
- Rock tumbling
- Not recommended
- Density
- 3.45 g/cm³
Chemical Properties
- Chemical Formula
- Cu2(AsO4)(OH) · 3H2O
- Elements
- As, Cu, H, O
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Euchroite FAQs
How do I identify Euchroite?
Euchroite can be identified by its hardness of 3.5 - 4 on the Mohs scale, Bright emerald-green color. Look for these key characteristics when examining specimens.
What color is Euchroite?
Euchroite typically appears in Bright emerald-green, leek-green; bright bluish green in transmitted light.. Color can vary depending on impurities and formation conditions.
How hard is Euchroite?
Euchroite has a hardness of 3.5 - 4 on the Mohs scale. This gives it moderate hardness.
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